Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1470b9bcb404d9…

MALICIOUS

PDF

68.1 KB Created: 2021-09-29 01:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 89248b87fbd7390e26286a6c1a45dfbf SHA-1: 671096723279118ecbf18c8f6af5dfd754370302 SHA-256: ee1470b9bcb404d91ad0298de35b069d36485bfa8049b9c2ac389dff03cff04e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=have+a+nice+day+gif+funny PDF link annotation
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/22182213728.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615257ff5832e---wuxivenunumolepim.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/nurowotufojopomirati.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/koqjrj31k5b0d9fhnmapa564l4/fiduraxurixepun.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa13fb37f7---1439205201.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/newajapixopo.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcc570d14c---85536972044.pdfIn PDF document text
    • https://micsys.in/userfiles/file/givopoladasegopetedo.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/xaxopolaleboku.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109111853221124.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/86498967749.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/35546863488.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/22639170278.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/98307835087.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/wogaze.pdfIn PDF document text
    • http://handgun.ee/media/file/46124827685.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/ranenemif.pdfIn PDF document text
    • http://hidropro.hu/upload/limetenotafoxipegoni.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/tunis.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/zolisanutasibudugewog.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2dqjtms7j7iirhl8ri62kt69f6/siwipufururujilaw.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/75448997427.pdfIn PDF document text
    • https://ms01bet.com/contents/files/begufesowedipukivefemoko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC6 14732 bytes
SHA-256: 8523001bbea9d40db2560b1066ca227d2abeff8c6aebfcce5ee0694789d403de
font_01_sfnt_off0000d405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD405 10392 bytes
SHA-256: ae86dcf77b3ee71a92e5da0812b25499f876f2a2646d7ace169273ada3feb33b
font_02_sfnt_off0000eb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1